The regularity of the change of the unstable oscillation wave form and the structure of the power spectrum were analysed.
计算并绘出了非稳区域边界，分析了非稳振荡波形变化规律及其模结构。
The following conclusions are obtained: 1. the density wave in an unstable area develops a finite continuous oscillation.
得到如下一些重要结论：1。不稳定区域密度波振荡为有限的持续振荡。
Results show that the quasi biennial (QB) oscillation is the most unstable mode of the linear coupled air sea system and only the QB mode displays ENSO-like horizontal structure.
结果表明：准两年振荡是线性海气耦合系统中的最不稳定模态，且只有该模态类似于ENSO水平结构。
In this paper, we study the existence of positive solutions and the bounded oscillation of a class of high order unstable type neutral differential equations.
本文研究一类不稳定型高阶中立型微分方程正解的存在性与有界振动。
In this paper, we study the existence of positive solutions and the bounded oscillation of a class of second order unstable type neutral differential equations.
本文研究一类不稳定型二阶中立型微分方程正解的存在性与有界振动。
Undamped input filter may cause converter system unstable or oscillation.
无阻尼输入滤波器可能使变换器系统不稳定或者振荡。
Self excited oscillation in turning process is a kind of unstable phenomenon resulting from former vibration trace. Eliminating of the phenomenon is a key technology in cutting process.
车削过程自激振荡是一种以残留振痕作为机械延时反馈造成的动态失稳现象，消除这一现象是机械加工过程中的技术关键之一。
A new fact is introduced which may lead to unstable shaft torsional oscillation of steam turbine.
介绍了一种能导致汽轮机轴系扭振失稳的因素。
A new fact is introduced which may lead to unstable shaft torsional oscillation of steam turbine.
介绍了一种能导致汽轮机轴系扭振失稳的因素。
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